More early tera fns and mention limitation of shortcodes in docs

components/site/src/lib.rs

@@ -339,20 +339,20 @@ impl Site {
             "load_data",
             global_fns::make_load_data(self.content_path.clone(), self.base_path.clone()),
         );
+        self.tera.register_function("trans", global_fns::make_trans(self.config.clone()));
+        self.tera.register_function(
+            "get_taxonomy_url",
+            global_fns::make_get_taxonomy_url(&self.taxonomies),
+        );
     }
 
     pub fn register_tera_global_fns(&mut self) {
-        self.tera.register_function("trans", global_fns::make_trans(self.config.clone()));
         self.tera.register_function("get_page", global_fns::make_get_page(&self.library));
         self.tera.register_function("get_section", global_fns::make_get_section(&self.library));
         self.tera.register_function(
             "get_taxonomy",
             global_fns::make_get_taxonomy(&self.taxonomies, &self.library),
         );
-        self.tera.register_function(
-            "get_taxonomy_url",
-            global_fns::make_get_taxonomy_url(&self.taxonomies),
-        );
     }
 
     /// Add a page to the site

docs/content/documentation/content/shortcodes.md

@@ -36,6 +36,10 @@ That's it, Zola will now recognise this template as a shortcode named `youtube`
 The markdown renderer will wrap an inline HTML node like `<a>` or `<span>` into a paragraph. If you want to disable that,
 simply wrap your shortcode in a `div`.
 
+Shortcodes are rendered before parsing the markdown so it doesn't have access to the table of contents. Because of that,
+you also cannot use the `get_page`/`get_section`/`get_taxonomy` global function. It might work while running `zola serve` because
+it has been loaded but it will fail during `zola build`.
+
 ## Using shortcodes
 
 There are two kinds of shortcodes: